Fix code style

[jkruzik]

Fix code style according to PETSc style guide and remove/rename legacy macros/functions.

• Replace TRY() with ierr= ;CHKERRQ(ierr);
• Do not use a space after the ) in a cast or between the type and the * in a cast.
• replace %f formatting string with %g and always cast to double
• fix whitespace issues in function declarations, calls, and variable declarations
• remove trailing whitespaces
• remove #undef __FUNCT__ / #define __FUNCT__ (Get rid of #undef __FUNCT__ / #define __FUNCT__ permon#17)
• remove FLLOP macros/functions in favour of PETSC macros/functions or rename them to PERMON (suggestions for permonsys.h permon#41)

The issues are valid also for PermonQP and should be fixed at the same time.

[mpecha]

I think, this fix is not so urgent and can wait after fixing the code style in core package. :)